/
site_query.go
458 lines (419 loc) · 14.4 KB
/
site_query.go
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package main
import (
"context"
"encoding/json"
"fmt"
"os"
"strings"
"github.com/skupperproject/skupper/pkg/utils"
"github.com/skupperproject/skupper/pkg/version"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"github.com/skupperproject/skupper/api/types"
"github.com/skupperproject/skupper/client"
"github.com/skupperproject/skupper/pkg/certs"
"github.com/skupperproject/skupper/pkg/data"
"github.com/skupperproject/skupper/pkg/event"
"github.com/skupperproject/skupper/pkg/kube"
"github.com/skupperproject/skupper/pkg/qdr"
)
const (
SiteQueryError string = "SiteQueryError"
SiteQueryRequest string = "SiteQueryRequest"
GatewayQueryError string = "GatewayQueryError"
GatewayQueryRequest string = "GatewayQueryRequest"
ServiceCheckError string = "ServiceCheckError"
ServiceCheckRequest string = "ServiceCheckRequest"
)
type SiteQueryServer struct {
client *client.VanClient
agentPool *qdr.AgentPool
server *qdr.RequestServer
iplookup *IpLookup
siteInfo data.Site
}
func newSiteQueryServer(cli *client.VanClient, config *certs.TlsConfigRetriever) *SiteQueryServer {
sqs := SiteQueryServer{
client: cli,
agentPool: qdr.NewAgentPool("amqps://"+types.QualifiedServiceName(types.LocalTransportServiceName, cli.Namespace)+":5671", config),
iplookup: NewIpLookup(cli, nil),
}
sqs.getLocalSiteInfo()
sqs.server = qdr.NewRequestServer(getSiteQueryAddress(sqs.siteInfo.SiteId), &sqs, sqs.agentPool)
return &sqs
}
func siteQueryError(err error) {
}
func (s *SiteQueryServer) getLocalSiteInfo() {
s.siteInfo.SiteId = os.Getenv("SKUPPER_SITE_ID")
s.siteInfo.SiteName = os.Getenv("SKUPPER_SITE_NAME")
s.siteInfo.Namespace = os.Getenv("SKUPPER_NAMESPACE")
s.siteInfo.Version = version.Version
url, err := getSiteUrl(s.client)
if err != nil {
event.Recordf(SiteQueryError, "Failed to get site url: %s", err)
} else {
s.siteInfo.Url = url
}
}
func (s *SiteQueryServer) getLocalSiteQueryData() (data.SiteQueryData, error) {
data := data.SiteQueryData{
Site: s.siteInfo,
}
agent, err := s.agentPool.Get()
if err != nil {
return data, fmt.Errorf("Could not get management agent: %s", err)
}
defer s.agentPool.Put(agent)
routers, err := agent.GetAllRouters()
if err != nil {
return data, fmt.Errorf("Error retrieving routers: %s", err)
}
err = getServiceInfo(agent, routers, &data, s.iplookup)
if err != nil {
return data, fmt.Errorf("Error getting local service info: %s", err)
}
return data, nil
}
func (s *SiteQueryServer) getGatewayQueryData() ([]data.SiteQueryData, error) {
results := []data.SiteQueryData{}
agent, err := s.agentPool.Get()
if err != nil {
return results, fmt.Errorf("Could not get management agent: %s", err)
}
defer s.agentPool.Put(agent)
gateways, err := agent.GetLocalGateways()
if err != nil {
return results, fmt.Errorf("Error retrieving gateways: %s", err)
}
for _, gateway := range gateways {
data := data.SiteQueryData{
Site: data.Site{
SiteName: qdr.GetSiteNameForGateway(&gateway),
SiteId: gateway.Site.Id,
Version: gateway.Site.Version,
Connected: []string{s.siteInfo.SiteId},
Edge: true,
Gateway: true,
},
}
err = getServiceInfoForRouters(agent, []qdr.Router{gateway}, &data, s.iplookup)
if err != nil {
return results, fmt.Errorf("Error getting local service info: %s", err)
}
results = append(results, data)
}
return results, nil
}
func getSiteUrl(vanClient *client.VanClient) (string, error) {
if vanClient.RouteClient == nil {
service, err := vanClient.KubeClient.CoreV1().Services(vanClient.Namespace).Get(context.TODO(), types.TransportServiceName, metav1.GetOptions{})
if err != nil {
return "", err
} else {
if service.Spec.Type == corev1.ServiceTypeLoadBalancer {
host := kube.GetLoadBalancerHostOrIp(service)
return host, nil
} else {
return "", nil
}
}
} else {
route, err := vanClient.RouteClient.Routes(vanClient.Namespace).Get(context.TODO(), "skupper-inter-router", metav1.GetOptions{})
if err != nil {
return "", err
} else {
return route.Spec.Host, nil
}
}
}
func getSiteQueryAddress(siteId string) string {
return siteId + "/skupper-site-query"
}
const (
ServiceCheck string = "service-check"
GatewayQuery string = "gateway-query"
)
func (s *SiteQueryServer) Request(request *qdr.Request) (*qdr.Response, error) {
if request.Type == ServiceCheck {
return s.HandleServiceCheck(request)
} else if request.Type == GatewayQuery {
return s.HandleGatewayQuery(request)
} else {
return s.HandleSiteQuery(request)
}
}
func (s *SiteQueryServer) HandleSiteQuery(request *qdr.Request) (*qdr.Response, error) {
// if request has explicit version, send SiteQueryData, else send LegacySiteData
if request.Version == "" {
event.Record(SiteQueryRequest, "legacy site data request")
data := s.siteInfo.AsLegacySiteInfo()
bytes, err := json.Marshal(data)
if err != nil {
return nil, fmt.Errorf("Could not encode response: %s", err)
}
return &qdr.Response{
Version: version.Version,
Body: string(bytes),
}, nil
} else {
event.Record(SiteQueryRequest, "site data request")
data, err := s.getLocalSiteQueryData()
if err != nil {
return nil, fmt.Errorf("Could not get response: %s", err)
}
bytes, err := json.Marshal(data)
if err != nil {
return nil, fmt.Errorf("Could not encode response: %s", err)
}
return &qdr.Response{
Version: version.Version,
Body: string(bytes),
}, nil
}
}
func (s *SiteQueryServer) HandleServiceCheck(request *qdr.Request) (*qdr.Response, error) {
event.Recordf(ServiceCheckRequest, "checking service %s", request.Body)
data, err := s.getServiceDetail(context.Background(), request.Body)
if err != nil {
return &qdr.Response{
Version: version.Version,
Type: ServiceCheckError,
Body: err.Error(),
}, nil
}
bytes, err := json.Marshal(data)
if err != nil {
return nil, fmt.Errorf("Could not encode service check response: %s", err)
}
return &qdr.Response{
Version: version.Version,
Type: request.Type,
Body: string(bytes),
}, nil
}
func (s *SiteQueryServer) HandleGatewayQuery(request *qdr.Request) (*qdr.Response, error) {
event.Record(GatewayQueryRequest, "gateway request")
data, err := s.getGatewayQueryData()
if err != nil {
return nil, fmt.Errorf("Could not get response: %s", err)
}
bytes, err := json.Marshal(data)
if err != nil {
return nil, fmt.Errorf("Could not encode response: %s", err)
}
return &qdr.Response{
Version: version.Version,
Body: string(bytes),
}, nil
}
func (s *SiteQueryServer) run() {
for {
ctxt := context.Background()
err := s.server.Run(ctxt)
if err != nil {
event.Recordf(SiteQueryError, "Error handling requests: %s", err)
}
}
}
func (s *SiteQueryServer) start(stopCh <-chan struct{}) error {
err := s.iplookup.start(stopCh)
go s.run()
return err
}
func getTcpAddressFilter(address string) qdr.TcpEndpointFilter {
return func(endpoint *qdr.TcpEndpoint) bool {
return matchQualifiedAddress(address, endpoint.Address)
}
}
func getHttpAddressFilter(address string) qdr.HttpEndpointFilter {
return func(endpoint *qdr.HttpEndpoint) bool {
return matchQualifiedAddress(address, endpoint.Address)
}
}
func matchQualifiedAddress(unqualified string, qualified string) bool {
return unqualified == strings.Split(qualified, ":")[0]
}
func (s *SiteQueryServer) getServiceDetail(context context.Context, address string) (data.ServiceDetail, error) {
detail := data.ServiceDetail{
SiteId: s.siteInfo.SiteId,
}
definition, err := s.client.ServiceInterfaceInspect(context, address)
if err != nil {
return detail, err
}
if definition == nil {
return detail, fmt.Errorf("No such service %q", address)
}
detail.Definition = *definition
service, err := kube.GetService(address, s.client.Namespace, s.client.KubeClient)
if err != nil {
return detail, err
}
detail.IngressBinding.ServicePorts = map[int]int{}
for _, ports := range service.Spec.Ports {
if utils.IntSliceContains(detail.Definition.Ports, int(ports.Port)) {
detail.IngressBinding.ServicePorts[int(ports.Port)] = ports.TargetPort.IntValue()
} else {
detail.AddObservation(fmt.Sprintf("Kubernetes service defines port %s %d:%d which is not in skupper service definition", ports.Name, ports.Port, ports.TargetPort.IntValue()))
}
}
detail.IngressBinding.ServiceSelector = service.Spec.Selector
agent, err := s.agentPool.Get()
if err != nil {
return detail, fmt.Errorf("Could not get management agent: %s", err)
}
defer s.agentPool.Put(agent)
if detail.Definition.Protocol == "tcp" {
listeners, err := agent.GetLocalTcpListeners(getTcpAddressFilter(detail.Definition.Address))
if err != nil {
detail.AddObservation(fmt.Sprintf("Error retrieving tcp listeners: %s", err))
} else {
detail.ExtractTcpListenerPorts(listeners)
}
connectors, err := agent.GetLocalTcpConnectors(getTcpAddressFilter(detail.Definition.Address))
if err != nil {
detail.AddObservation(fmt.Sprintf("Error retrieving tcp connectors for %s: %s", detail.Definition.Address, err))
} else {
detail.ExtractTcpConnectorPorts(connectors)
}
} else if detail.Definition.Protocol == "http" || detail.Definition.Protocol == "http2" {
listeners, err := agent.GetLocalHttpListeners(getHttpAddressFilter(detail.Definition.Address))
if err != nil {
detail.AddObservation(fmt.Sprintf("Error retrieving http listeners: %s", err))
} else {
detail.ExtractHttpListenerPorts(listeners)
}
connectors, err := agent.GetLocalHttpConnectors(getHttpAddressFilter(detail.Definition.Address))
if err != nil {
detail.AddObservation(fmt.Sprintf("Error retrieving http connectors for %s: %s", detail.Definition.Address, err))
} else {
detail.ExtractHttpConnectorPorts(connectors)
}
} else {
detail.AddObservation(fmt.Sprintf("Unrecognised protocol: %s", detail.Definition.Protocol))
}
if len(detail.Definition.Targets) > 0 && len(detail.EgressBindings) == 0 {
detail.AddObservation(fmt.Sprintf("No connectors on %s for %s ", detail.SiteId, detail.Definition.Address))
}
return detail, nil
}
func querySites(agent qdr.RequestResponse, sites []data.SiteQueryData) {
for i, s := range sites {
request := qdr.Request{
Address: getSiteQueryAddress(s.SiteId),
Version: version.Version,
}
// Non kubernetes sites do not yet have a Service Controller,
// this request won't be sent to avoid an unnecessary timeout.
if utils.DefaultStr(s.Platform, string(types.PlatformKubernetes)) != string(types.PlatformKubernetes) {
continue
}
response, err := agent.Request(&request)
if err != nil {
event.Recordf(SiteQueryError, "Request to %s failed: %s", s.SiteId, err)
} else if response.Version == "" {
// assume legacy version of site-query protocol
info := data.LegacySiteInfo{}
err := json.Unmarshal([]byte(response.Body), &info)
if err != nil {
event.Recordf(SiteQueryError, "Error parsing legacy json %q from %s: %s", response.Body, s.SiteId, err)
} else {
sites[i].SiteName = info.SiteName
sites[i].Namespace = info.Namespace
sites[i].Url = info.Url
sites[i].Version = info.Version
}
} else {
site := data.SiteQueryData{}
err := json.Unmarshal([]byte(response.Body), &site)
if err != nil {
event.Recordf(SiteQueryError, "Error parsing json for site query %q from %s: %s", response.Body, s.SiteId, err)
} else {
sites[i].SiteName = site.SiteName
sites[i].Namespace = site.Namespace
sites[i].Url = site.Url
sites[i].Version = site.Version
sites[i].TcpServices = site.TcpServices
sites[i].HttpServices = site.HttpServices
}
}
}
}
func queryGateways(agent qdr.RequestResponse, sites []data.SiteQueryData) []data.SiteQueryData {
gateways := []data.SiteQueryData{}
for _, s := range sites {
request := qdr.Request{
Address: getSiteQueryAddress(s.SiteId),
Version: version.Version,
Type: GatewayQuery,
}
// Non kubernetes sites do not yet have a Service Controller,
// this request won't be sent to avoid an unnecessary timeout.
if utils.DefaultStr(s.Platform, string(types.PlatformKubernetes)) != string(types.PlatformKubernetes) {
continue
}
response, err := agent.Request(&request)
if err != nil {
event.Recordf(GatewayQueryError, "Request to %s failed: %s", s.SiteId, err)
} else {
sites := []data.SiteQueryData{}
err := json.Unmarshal([]byte(response.Body), &sites)
if err != nil {
event.Recordf(SiteQueryError, "Error parsing json for site query %q from %s: %s", response.Body, s.SiteId, err)
}
gateways = append(gateways, sites...)
}
}
return gateways
}
func getServiceInfo(agent *qdr.Agent, network []qdr.Router, site *data.SiteQueryData, lookup data.NameMapping) error {
return getServiceInfoForRouters(agent, qdr.GetRoutersForSite(network, site.SiteId), site, lookup)
}
func getServiceInfoForRouters(agent *qdr.Agent, routers []qdr.Router, site *data.SiteQueryData, lookup data.NameMapping) error {
bridges, err := agent.GetBridges(routers)
if err != nil {
return fmt.Errorf("Error retrieving bridge configuration: %s", err)
}
httpRequestInfo, err := agent.GetHttpRequestInfo(routers)
if err != nil {
return fmt.Errorf("Error retrieving http request info: %s", err)
}
tcpConnections, err := agent.GetTcpConnections(routers)
if err != nil {
return fmt.Errorf("Error retrieving tcp connection info: %s", err)
}
site.HttpServices = data.GetHttpServices(site.SiteId, httpRequestInfo, qdr.GetHttpConnectors(bridges), qdr.GetHttpListeners(bridges), lookup)
site.TcpServices = data.GetTcpServices(site.SiteId, tcpConnections, qdr.GetTcpConnectors(bridges), lookup)
return nil
}
func checkServiceForSites(agent qdr.RequestResponse, address string, sites *data.ServiceCheck) error {
details := []data.ServiceDetail{}
for _, s := range sites.Details {
request := qdr.Request{
Address: getSiteQueryAddress(s.SiteId),
Version: version.Version,
Type: ServiceCheck,
Body: address,
}
response, err := agent.Request(&request)
if err != nil {
event.Recordf(ServiceCheckError, "Request to %s failed: %s", s.SiteId, err)
return err
}
if response.Type == ServiceCheckError {
sites.AddObservation(fmt.Sprintf("%s on %s", response.Body, s.SiteId))
} else {
detail := data.ServiceDetail{}
err = json.Unmarshal([]byte(response.Body), &detail)
if err != nil {
event.Recordf(ServiceCheckError, "Error parsing json for service check %q from %s: %s", response.Body, s.SiteId, err)
return err
}
details = append(details, detail)
}
}
sites.Details = details
data.CheckService(sites)
return nil
}